臺灣博碩士論文加值系統

台灣大型污染源多位於西部，此區空氣污染物濃度普遍高於台灣東部，海陸風風向轉換，使大型污染源所排放污染物的傳輸與擴散十分複雜，產生污染物迴流的現象。本研究分別選擇 2018年1月(冬)、4月(春)、7月(夏)、9月(秋)等四季案例，利用WRF氣象模式及CALPUFF空氣品質模式對高雄燃煤電廠之煙囪擴散進行模擬，探討執行海陸風效應對區域空氣品質之影響。
模擬結果顯示：大致上日間至下午夜間均有較高的污染物從海面吹入境內，此時污染物多累積於沿海陸境內直至次日晨間，分析顯著海陸風時段與先前彙整相關氣象參數(風向、風速)的結果相符，驗證有海風影響時，污染物將偏向於流入台灣；各月份的盛行海陸風濃度分布因風向轉換日夜間不同，呈現大範圍扇形擴散，1月夜間濃度則因日夜間皆為單一風向轉換，呈現狹長形擴散，推測盛行海陸風所造成污染物可能有向境內迂迴及累積現象；另外，可發現除了日出時間越晚的月份（7月與9月），午後有較大區域的污染物團，在陸地與海洋邊界處來回擺動，甚至向內陸累積，本質上不利於都會區或沿岸釋放污染物的往外海擴散，為需要加以關切之處。

Most of large-scale pollution sources are located in the western Taiwan. The concentration of the air pollutants in this area is generally higher than that in eastern Taiwan. In addition, the diffusion and expansion of those pollutants are complex due to the effects of Mongolian high pressure in winter and Pacific high pressure in summer, and the sea-land breeze.Analyzing the characteristics of plumes flows in southern Taiwan indicates that the distribution of pollutants would be affected by the sea-land breeze and result in circulation of air pollutants in some particular places, attracting investigation efforts on it.Accordingly, this study investigates the effects of sea-land breeze in January, April, July, and September of 2018 on the dispersion of SO2 in the ambient air of southern Taiwan.The SO2 was emitted from a coal power plant. Both WRF weather model and CALPUFF air quality model were applied.
According to the modeling and observed results, air pollutants flowed toward land during the day time, but they would transport backward to the coastal area during the night time, causing the accumulation of air pollutants within the region between coastal and inland area. The statistical data of relevant meteorological parameters (wind direction and wind speed) are consistent with the time period of the sea-land breeze for the previous analysis.It certifies the pollutants tend to flow into Taiwan under the influence of the sea breeze and the distribution of the pollutant concentration at night presents wide fan-shaped expansion due to the changes of wind directions during the day and night in the months whose sea-land breeze is prevalent.
In general, In January, the nighttime concentration manifests a narrow and long expansion due to the change of single wind direction during the day and night, indicating the pollutants flowing back and forth and accumulating near costal area. Moreover, in the month when the sunrise time is later (July and September), it is more likely that larger pollutant mass swings back and forth at the land-sea border in the afternoon, and even accumulates inland. All these phenomenon basically hinder the dispersion of air pollutants emitted from coastal area.

摘要 I
Abstract II
誌謝 IV
目錄 V
圖目錄 VII
表目錄 X
第一章 前言 1
1.1研究緣起 1
1.2研究目的 4
第二章 文獻回顧 5
2.1 沿海區域海陸風效應 5
2.2 WRF氣象模式 7
2.3 CALPUFF擴散模式介紹 7
2.4 燃煤電廠排放硫氧化物排放與管制情況 8
2.5 臺灣氣候分析 14
第三章 研究方法 24
3.1 研究流程 24
3.2 個案篩選 25
3.3 CALPUFF模式與氣象場前處理運作 26
3.4 區域模擬 27
第四章 結果與討論 29
4.1 冬季案例區域海陸風場變化分析及SO2擴散行為 29
4.2 春季案例區域海陸風場變化分析及SO2擴散行為 37
4.3 夏季案例區域海陸風場變化分析及SO2擴散行為 45
4.4 秋季案例區域海陸風場變化分析及SO2擴散行為 53
4.5 綜合案例區域海陸風場變化與污染物擴散關係 61
第五章 結論與建議 63
5.1 結論 63
5.2 建議事項 64
參考文獻 65

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